US Bridges

E Main ST over Linn Creek

Fair

Marshall County, Iowa · 084182501 · Structure no. 000000000007850

Built
1972
53 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete Continuous
Length
210 ft
5 main spans
Daily traffic
3,399
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

E Main ST over Linn Creek is a concrete continuous slab carrying E Main ST over Linn Creek in Marshall County, Iowa. It was built in 1972, so it is 53 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 3,399 vehicles a day, projected to reach 3,399 by 2043. The structure is 210 ft (64 m) long and 58 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesE Main ST
CrossesLinn Creek
Location084182501
RouteCity Street 0
CountyMarshall County
StateIowa
Coordinates42.04922, -92.89343
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating67.2 US tons
Inventory rating40.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length210 ft (64 m)
Longest span46 ft (14 m)
Deck width58 ft (17.8 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,399 (2022)
Projected traffic3,399 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$17,000
NavigationNo navigation control on waterway

Frequently asked questions

When was E Main ST over Linn Creek built?

It was built in 1972, making it 53 years old in 2025.

What condition is E Main ST over Linn Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2023.

How much traffic does E Main ST over Linn Creek carry?

About 3,399 vehicles per day (2022 count).

How long is E Main ST over Linn Creek?

The structure is 210 ft (64 m) long with a longest span of 46 ft (14 m) and a deck 58 ft wide.

Who owns E Main ST over Linn Creek?

It is owned by the City or Municipal Highway Agency.